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The Reproductive Performance of Ewes Grazing Birdsfoot Trefoil-smooth Bromegrass, Alfalfa-smooth Bromegrass and N Fertilized Smooth Bromegrass Pastures

Rebecca Perkins

出版	Kansas State University, 1982
URL	http://books.google.com.hk/books?id=erCANwAACAAJ&hl=&source=gbs_api